Best books are The Rough Guide To reggae, should be available everywhere, and one called Reggae & Carribean Musi9c by dave Thompson (www.backbeatbooks.com) not sure how much but I bought it for 4.99 in Walsall a few years ago - this is so good I've read the print off it, and it reviews hudreds of 45's from the 60's. The two books by Sanctuary are good too, Tighten Up and Young Gidted & Black, all about Trojan and the UK reggae scene, both still available.
Music wise, see if you can find any of my old podcasts (search on here) if I was able to advertise I could do you a few thousand tracks on disc but I can't so...
there's a few forums too, will try and get back to you with more info but looks like I have to go out for a bit!